.page-faq {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-faq .faq-topbar {
  padding-top: 18px;
}

.page-faq .crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.page-faq .crumbs a {
  color: var(--lime-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--ease);
}

.page-faq .crumbs a:hover {
  border-bottom-color: var(--lime);
}

.page-faq .crumbs-sep {
  color: var(--line);
}

/* Hero */
.page-faq .faq-hero {
  position: relative;
  padding: 28px 0 8px;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -30% -15% auto -15%;
  height: 460px;
  background:
    radial-gradient(58% 78% at 12% 4%, rgba(198, 255, 61, .20), transparent 66%),
    radial-gradient(52% 70% at 88% 14%, rgba(255, 138, 42, .16), transparent 70%);
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-kicker {
  margin: 0 0 14px;
  font-size: 14px;
  letter-spacing: .12em;
  color: var(--lime-soft);
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 8vw, 4rem);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .faq-hero h1 .hl {
  display: inline-block;
  background: linear-gradient(180deg, transparent 62%, rgba(198, 255, 61, .35) 62%);
  color: var(--lime);
}

.page-faq .faq-hero .lede {
  margin: 18px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-hero-facts {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
}

.page-faq .faq-hero-facts li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-left: 3px solid var(--lime);
  border-radius: var(--r-sm);
}

.page-faq .faq-hero-facts .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 22px;
  color: var(--lime);
  letter-spacing: -.01em;
}

.page-faq .fact-label {
  font-size: 14px;
  color: var(--muted);
}

/* 章节通用 */
.page-faq .faq-section-head {
  margin-bottom: 22px;
}

.page-faq .faq-section-head h2,
.page-faq .faq-board-title,
.page-faq .faq-contact h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.4rem, 5.4vw, 2.15rem);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-section-head p {
  margin: 10px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

/* 三步路径 */
.page-faq .step-track {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-faq .step-card {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 12px 16px;
  padding: 18px 44px 20px 18px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  cursor: pointer;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .step-card:hover {
  border-color: var(--lime-soft);
}

.page-faq .step-card:focus-within {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.page-faq .step-check {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.page-faq .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  padding: 4px 6px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 20px;
  color: var(--ink);
  background: var(--lime-soft);
  border-radius: var(--r-sm);
  transition: background .2s var(--ease), color .2s var(--ease);
}

.page-faq .step-body {
  display: block;
}

.page-faq .step-title {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .step-text {
  display: block;
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .step-mark {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 22px;
  height: 22px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--ink-3);
  transition: background .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .step-mark::after {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  background: var(--lime);
  clip-path: polygon(18% 48%, 8% 60%, 40% 88%, 92% 24%, 80% 14%, 40% 66%);
  opacity: 0;
  transition: opacity .2s var(--ease);
}

.page-faq .step-check:checked ~ .step-num {
  background: var(--orange);
  color: var(--ink);
}

.page-faq .step-check:checked ~ .step-mark {
  border-color: var(--lime);
  background: var(--ink);
}

.page-faq .step-check:checked ~ .step-mark::after {
  opacity: 1;
}

.page-faq .step-check:checked ~ .step-body .step-title {
  color: var(--lime);
}

/* 图片 */
.page-faq .media {
  margin: 24px 0 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-2);
}

.page-faq .media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .media-caption {
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  background: var(--ink-2);
  border-top: 1px solid var(--line);
}

/* 问答区 */
.page-faq .faq-board-title {
  margin-bottom: 20px;
}

.page-faq .faq-board-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-faq .faq-index {
  padding: 18px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
}

.page-faq .faq-index-title {
  margin: 0 0 14px;
  font-size: 15px;
  letter-spacing: .1em;
  color: var(--lime-soft);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-faq .faq-index-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 8px;
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--paper);
  text-decoration: none;
  border-radius: var(--r-sm);
  border-left: 2px solid transparent;
  transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-index-list a:hover {
  background: var(--ink-3);
  border-left-color: var(--lime);
  color: var(--lime);
}

.page-faq .faq-index-list .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  color: var(--orange-soft);
}

.page-faq .faq-index-note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-group + .faq-group {
  margin-top: 34px;
}

.page-faq .faq-group h3 {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: -.01em;
  color: var(--paper);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group h3 .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  color: var(--orange);
}

.page-faq .tag {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 11.5px;
  letter-spacing: .06em;
  padding: 3px 9px;
  border-radius: var(--pill);
  border: 1px solid var(--line);
  color: var(--muted);
  background: var(--ink-3);
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-left: 3px solid transparent;
  border-radius: var(--r-sm);
  background: var(--ink-2);
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 10px;
}

.page-faq .faq-item[open] {
  border-left-color: var(--lime);
  background: var(--ink-3);
}

.page-faq .faq-item summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 15px 46px 15px 16px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--paper);
}

.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 16px;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--lime);
}

.page-faq .faq-item[open] summary::after {
  content: "–";
}

.page-faq .faq-item summary:hover {
  color: var(--lime-soft);
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -3px;
}

.page-faq .faq-answer {
  padding: 0 16px 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 36em;
}

.page-faq .faq-answer p {
  margin: 12px 0 0;
}

.page-faq .faq-steps-list {
  counter-reset: fs;
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-steps-list li {
  counter-increment: fs;
  position: relative;
  padding-left: 32px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--paper);
}

.page-faq .faq-steps-list li::before {
  content: counter(fs, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  color: var(--ink);
  background: var(--lime-soft);
  border-radius: 4px;
  padding: 2px 5px;
}

.page-faq .faq-device-figure {
  margin-top: 30px;
}

/* 联络区 */
.page-faq .faq-contact-section {
  padding-top: 8px;
}

.page-faq .faq-contact {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: 24px 20px;
  background: linear-gradient(150deg, var(--ink-3), var(--ink-2) 60%, var(--ink-2));
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
}

.page-faq .faq-contact-main p {
  margin: 12px 0 0;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-contact-note {
  color: var(--lime-soft);
  font-size: 13.5px;
}

.page-faq .faq-contact-main .btn {
  margin-top: 20px;
}

.page-faq .faq-contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-faq .faq-contact-list li {
  padding: 12px 14px;
  background: rgba(6, 30, 24, .55);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
}

.page-faq .faq-contact-key {
  display: block;
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--orange-soft);
}

.page-faq .faq-contact-value {
  display: block;
  margin-top: 4px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-contact-value.num {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: .02em;
}

.page-faq .faq-next {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-next-label {
  margin: 0 0 12px;
  font-size: 14px;
  letter-spacing: .1em;
  color: var(--muted);
}

.page-faq .faq-next-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
}

.page-faq .faq-next-list a {
  display: inline-block;
  padding: 9px 16px;
  font-size: 14px;
  color: var(--paper);
  text-decoration: none;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--pill);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-next-list a:hover {
  border-color: var(--lime);
  color: var(--lime);
}

/* 平板及以上 */
@media (min-width: 640px) {
  .page-faq .faq-hero-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .step-track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .step-card {
    padding: 20px 18px 22px;
  }

  .page-faq .step-mark {
    top: auto;
    bottom: 16px;
    right: 16px;
  }

  .page-faq .faq-contact {
    padding: 32px 28px;
  }

  .page-faq .faq-contact-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* 桌面：左索引 + 右答案 */
@media (min-width: 920px) {
  .page-faq .faq-hero {
    padding-top: 40px;
  }

  .page-faq .faq-board-grid {
    grid-template-columns: 272px minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: start;
    padding: 40px 36px;
  }

  .page-faq .faq-contact-list {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-answer {
    padding-bottom: 22px;
  }

  .page-faq .faq-device-figure {
    margin-top: 38px;
  }
}
<<<END>>>